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Established in 2000, Zhejiang Yongtailong Electronic Co., Ltd. is located in the center of Shanghai, Hangzhou and Suzhou cities. YTL is a professional China DEM3B302 Three Phase High Refresh MID Din Rail Meter Suppliers and DEM3B302 Three Phase High Refresh MID Din Rail Meter Company. With more than 20 years of energy metering experience, we devote ourselves to providing competitive projects and creating value for customers. YTL was one of the first companies in the domestic market with which had an internal R&D department as well as international sales business. Since our foundation in 2000 we have grown to a manufacturer which complies and meet to many specifications from our national and international partners. At present our export volume makes us a leading company for technology and product export to more than 50 countries throughout the world. With provincial high-tech enterprise R&D center, YTL is the Top 100-enterprise with most investment value in Zhejiang. And“Yongtailong”is the famous brand of Zhejiang. For any new products of customers, we will communicate with customers very professionally, listen to their opinions and give useful suggestions to ensure that excellent quality products are made.
DEM3B302 Three Phase High Refresh MID Din Rail Meter Suppliers
DEM3B302 Three Phase High Refresh MID Din Rail Meter
The DEM3B302 is a three-phase direct-type energy meter that employs a high-speed processing chip solution, specifically designed for high-speed metering scenarios such as photovoltaic systems, energy storage systems, and factory energy monitoring. Simultaneously, its wide operating temperature range of -40℃ to 70℃ meets the requirements for application in outdoor charging piles exposed directly to sunlight.
- Voltage input
- Current input
- Communication parameters
- Function parameters
- Structure
- Dimension
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voltage connection
direct
rated voltage
120~240VLN/208~415VLL
voltage tolerance
from 0.8 to 1.15 Un
frequency
50/60Hz
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current connection
direct
basic current
（Ib）
5A
minimum current
（Im in）
0.15A
Maximum current
（Imax）
80A
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communication method
RS485
protocol
RS485 compatible with Modbus RTU, DLT/645-2007
communication type
bidirectional
RS485 connection type
RS485 configuration parameters
Modbus address( from 1 to 247)
Baud rate（9.6/19.2/38.4/57.6/76.8/115.2 kbps）
Parity check (none/odd/even)
Refresh time
≤100ms
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Measurement function
Monitor energy consumption, key electrical variables (including active and reactive power, power factor), and calculate current/voltage harmonic content and apparent energy
Measurement method
Forward and reverse metering, net bi-directional; first record single-phase then calculate, then separately account for kwh+ and kwh-, absolute value measurement.
Tariff
TOU tariff, 4 tariffs by default, 8 time periods.
Self-diagnosis
EEP Detection
Event alarm
Monitor variable alarms (kW, A, V L-N, V L-L, PF, Kvar, kVA), with adjustable activation thresholds and delays
Firmware upgrade
Local upgrade
Clock
Network automatic time calibration, temperature compensation.
Other functions
WIRING CHECK,Screen saver function, page filter, and runtime hour counter.
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Welcome To A National High-tech Enterprise
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2000
Established In
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500+
Employees
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60+
Export Country
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500+
Design Right Patent
YTL Honor
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MID
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KEMA
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DLMS
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IEC
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KEMA
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SGS
YTL News
View All News-
The Significance of Choosing MID-Certified Electricity Meters
2026-01-19In today’s era of increasingly standardized global trade and energy metrology, the selection of electricity meters is more than a simple comparison of techni...
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Sub-metering vs. Master Metering: Which Is Best for Commercial Building Management?
2026-01-16Introduction: The Evolving Landscape of Building Energy Let’s be honest: managing a commercial property in 2026 is a completely different ballgame than it was...
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Why DC Charging Piles Must Use DC Energy Meters
2026-01-16With the rapid popularization of electric vehicles (EVs) in recent years, DC charging piles (fast-charging piles), as the critical infrastructure for fast ener...
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Deeply Rooted in Metering, Envisioning a Smart Future: Yongtailong Electronics' 20-Year Journey
2026-01-15Amid the global wave of digital and green transformation in energy systems, accurate and reliable metering serves as the cornerstone for building new-type powe...
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Accurate Measurement, Intelligent Connection to the Future: The Smart Metering Journey of Yongtailong Electronics Co., Ltd.
2026-01-14As the perceptual cornerstone of the modern energy system, the accuracy and intelligence of electrical energy measurement are of vital importance. For more tha...
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Smart Meters: The Data Cornerstone for Building a Smart Electricity Consumption Experience
2026-01-13From mechanical meters to electronic ones, and now to smart meters, electrical energy metering technology has undergone multiple transformations. Today, the Ad...
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China DEM3B302 Three Phase High Refresh MID Din Rail Meter Company